{
 "ocl_version": "0.1.0",
 "name": "Lowfield Lane",
 "slug": "lowfield-lane",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.04238577832905,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 680.0,
   "end_distance_m": 682.0,
   "start_elevation_m": 223.60971416979856,
   "end_elevation_m": 224.17056188536515,
   "min_gradient_pct": -14.212401835646915
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.668438665370786,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 672.0,
   "end_distance_m": 675.0,
   "start_elevation_m": 221.81652516401743,
   "end_elevation_m": 222.61657832397856,
   "min_gradient_pct": -14.10673976621221
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.597900407860266,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 672.0,
   "end_distance_m": 677.0,
   "start_elevation_m": 221.81652516401743,
   "end_elevation_m": 223.09642018441045,
   "min_gradient_pct": -13.435491271052342
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 25.289390081674412,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 663.0,
   "end_distance_m": 673.0,
   "start_elevation_m": 219.57823755556703,
   "end_elevation_m": 222.10717656373447,
   "min_gradient_pct": -11.324279481747794
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.09110699346229,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 662.0,
   "end_distance_m": 682.0,
   "start_elevation_m": 219.3523404866727,
   "end_elevation_m": 224.17056188536515,
   "min_gradient_pct": -4.9630282635209255
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.868103981434842,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 662.0,
   "end_distance_m": 687.0,
   "start_elevation_m": 219.3523404866727,
   "end_elevation_m": 225.0693664820314,
   "min_gradient_pct": -3.0797819836116105
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.697007905107284,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 656.0,
   "end_distance_m": 706.0,
   "start_elevation_m": 218.56065354037486,
   "end_elevation_m": 228.9091574929285,
   "min_gradient_pct": -1.981247338516937
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.05007645435046,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 604.0,
   "end_distance_m": 704.0,
   "start_elevation_m": 210.5020014419249,
   "end_elevation_m": 228.55207789627536,
   "min_gradient_pct": 1.7927630654046993
  }
 ],
 "shape": {
  "ascent_concentration": 0.339,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 122.0,
  "shape_class": "sustained"
 },
 "length_m": 706.7502207251133,
 "start_elevation_m": 165.78080228231798,
 "end_elevation_m": 229.0560058063992,
 "endpoint_gain_m": 63.275203524081235,
 "overall_gradient_pct": 8.952979662201164,
 "accumulated_ascent_m": 65.53893229548831,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.597900407860266,
   "start_distance_m": 672.0,
   "end_distance_m": 677.0,
   "midpoint_distance_m": 674.5,
   "start_elevation_m": 221.81652516401743,
   "end_elevation_m": 223.09642018441045,
   "start_xy": [
    346183.367075689,
    504119.54144641303
   ],
   "end_xy": [
    346187.80201279477,
    504121.8504136541
   ]
  },
  "max_10m": {
   "gradient_pct": 25.289390081674412,
   "start_distance_m": 663.0,
   "end_distance_m": 673.0,
   "midpoint_distance_m": 668.0,
   "start_elevation_m": 219.57823755556703,
   "end_elevation_m": 222.10717656373447,
   "start_xy": [
    346175.51907064166,
    504115.39880720613
   ],
   "end_xy": [
    346184.25398123864,
    504120.00339721784
   ]
  },
  "max_20m": {
   "gradient_pct": 24.09110699346229,
   "start_distance_m": 662.0,
   "end_distance_m": 682.0,
   "midpoint_distance_m": 672.0,
   "start_elevation_m": 219.3523404866727,
   "end_elevation_m": 224.17056188536515,
   "start_xy": [
    346174.52118489303,
    504115.33381464734
   ],
   "end_xy": [
    346192.4091105737,
    504123.554643893
   ]
  },
  "max_25m": {
   "gradient_pct": 22.868103981434842,
   "start_distance_m": 662.0,
   "end_distance_m": 687.0,
   "midpoint_distance_m": 674.5,
   "start_elevation_m": 219.3523404866727,
   "end_elevation_m": 225.0693664820314,
   "start_xy": [
    346174.52118489303,
    504115.33381464734
   ],
   "end_xy": [
    346197.3963145381,
    504123.9121216973
   ]
  },
  "max_50m": {
   "gradient_pct": 20.697007905107284,
   "start_distance_m": 656.0,
   "end_distance_m": 706.0,
   "midpoint_distance_m": 681.0,
   "start_elevation_m": 218.56065354037486,
   "end_elevation_m": 228.9091574929285,
   "start_xy": [
    346169.89074557973,
    504111.7950877594
   ],
   "end_xy": [
    346216.2597760325,
    504122.0176637539
   ]
  },
  "max_100m": {
   "gradient_pct": 18.05007645435046,
   "start_distance_m": 604.0,
   "end_distance_m": 704.0,
   "midpoint_distance_m": 654.0,
   "start_elevation_m": 210.5020014419249,
   "end_elevation_m": 228.55207789627536,
   "start_xy": [
    346124.6643123161,
    504090.335667063
   ],
   "end_xy": [
    346214.27578403224,
    504122.2702008185
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -13.435491271052342,
   "start_distance_m": 578.0,
   "end_distance_m": 583.0,
   "midpoint_distance_m": 580.5,
   "start_elevation_m": 208.37510193515146,
   "end_elevation_m": 207.70332737159885,
   "start_xy": [
    346112.04680018144,
    504074.9872811121
   ],
   "end_xy": [
    346109.13525163825,
    504078.91488085384
   ]
  },
  "min_10m": {
   "gradient_pct": -11.324279481747794,
   "start_distance_m": 574.0,
   "end_distance_m": 584.0,
   "midpoint_distance_m": 579.0,
   "start_elevation_m": 208.7311117396027,
   "end_elevation_m": 207.59868379142793,
   "start_xy": [
    346112.67681274685,
    504071.0372102299
   ],
   "end_xy": [
    346108.56500079314,
    504079.69942356437
   ]
  },
  "min_20m": {
   "gradient_pct": -4.9630282635209255,
   "start_distance_m": 565.0,
   "end_distance_m": 585.0,
   "midpoint_distance_m": 575.0,
   "start_elevation_m": 208.58264298120469,
   "end_elevation_m": 207.5900373285005,
   "start_xy": [
    346112.47188035486,
    504062.0905245628
   ],
   "end_xy": [
    346108.7952522433,
    504080.6050621557
   ]
  },
  "min_25m": {
   "gradient_pct": -3.0797819836116105,
   "start_distance_m": 560.0,
   "end_distance_m": 585.0,
   "midpoint_distance_m": 572.5,
   "start_elevation_m": 208.3599828244034,
   "end_elevation_m": 207.5900373285005,
   "start_xy": [
    346111.76615977107,
    504057.144805669
   ],
   "end_xy": [
    346108.7952522433,
    504080.6050621557
   ]
  },
  "min_50m": {
   "gradient_pct": -1.981247338516937,
   "start_distance_m": 535.0,
   "end_distance_m": 585.0,
   "midpoint_distance_m": 560.0,
   "start_elevation_m": 208.58066099775897,
   "end_elevation_m": 207.5900373285005,
   "start_xy": [
    346101.828247011,
    504034.73590774584
   ],
   "end_xy": [
    346108.7952522433,
    504080.6050621557
   ]
  },
  "min_100m": {
   "gradient_pct": 1.7927630654046993,
   "start_distance_m": 485.0,
   "end_distance_m": 585.0,
   "midpoint_distance_m": 535.0,
   "start_elevation_m": 205.7972742630958,
   "end_elevation_m": 207.5900373285005,
   "start_xy": [
    346067.92334149283,
    503998.7895568424
   ],
   "end_xy": [
    346108.7952522433,
    504080.6050621557
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.04238577832905,
   "start_distance_m": 680.0,
   "end_distance_m": 682.0,
   "midpoint_distance_m": 681.0,
   "start_elevation_m": 223.60971416979856,
   "end_elevation_m": 224.17056188536515,
   "start_xy": [
    346190.46415403433,
    504123.23351153114
   ],
   "end_xy": [
    346192.4091105737,
    504123.554643893
   ]
  },
  "max_3m": {
   "gradient_pct": 26.668438665370786,
   "start_distance_m": 672.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 673.5,
   "start_elevation_m": 221.81652516401743,
   "end_elevation_m": 222.61657832397856,
   "start_xy": [
    346183.367075689,
    504119.54144641303
   ],
   "end_xy": [
    346186.0280115595,
    504120.9268774847
   ]
  }
 },
 "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). Diagnostic use only: never a headline or ranking value.",
 "quality_summary": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.035,
   "obstruction_max_height_m": 10.06,
   "flagged_windows_m": [
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "sample_interval_m": 1.0,
  "interpolation": "bilinear",
  "smoothing": "none",
  "gradient_windows_m": [
   5.0,
   10.0,
   20.0,
   25.0,
   50.0,
   100.0
  ],
  "diagnostic_windows_m": [
   2.0,
   3.0
  ],
  "elevation_crs": "EPSG:27700",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/england/bulk_dtm_1m/NY4500.tif"
  ],
  "calculated_at": "2026-08-19T18:40:24+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "elevation_provider": "Environment Agency",
  "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency",
  "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m",
  "elevation_tile_ids": [
   "NY4500.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 9.0% over 200 m (Terrain 50), gain 42.1 m over 585 m way. EXTENDED by graph walk: +0 segment(s) at base, +2 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Kentmere",
  "county": "Westmorland and Furness"
 }
}